Kavanaugh, 53, could be one of the most powerful and influential people in government for decades, and he's locking in a healthy six-figure salary, too.

Kavanaugh formerly served on the U.S. Court of Appeals for the D.C. Circuit, where judges make $220,600 a year, according to the U.S. Courts website. Associate justices on the Supreme Court make $255,300, while the Chief Justice, currently John Roberts, makes $267,000. These salaries usually increase by $2,000-$3,000 each year.

A seat on the court comes with some desirable benefits. Federal judges have the option to enroll in insurance plans through the Federal Employee Health Benefits system, whose website claims it offers "the widest selection of health plans in the country." And justices can look forward to a generous retirement package. If they retire at 70 after serving 10 years, or at 65 after serving 15 years, they qualify for an annual pension equal to their highest full salary.

Some justices invest. When the Supreme Court took a patent case involving Cisco in 2015, Breyer had to sit out because he owned up to $100,000 in Cisco stock.

The Center for Public Integrity analyzed 2016 financial disclosures to find that at least six, and perhaps all, of the sitting Supreme Court justices last year were millionaires. With an estimated net worth just over $6 million, Breyer is the wealthiest justice, with the possible exception of Gorsuch, since when the report was published Gorsuch had yet to disclose his finances for that year. His 2015 disclosure, however, indicated he was worth between $3.1 million and $7.2 million, the Center reports.

Kavanaugh claimed to have up to $65,000 in assets, which doesn't necessarily include items such as cars or mortgages, in a recent financial filing, as well $27,500 in non-investment income on top of his salary, reports Money. The house he shares with his wife and two daughters is valued at $1 million.